By: Joe Nelson

The Vikings kick off their 47th year of training camp in Mankato on Friday with a team walkthrough beginning at 10:30 a.m. That will be followed by an afternoon practice (helmets only) from 2:45 - 5:00 p.m.

We'll be watching every move closely and trying to find answers to a number of training camp questions. Here are some of the talkers we'll be focusing on.

How will Matt Kalil hold up against Jared Allen?

Will Adrian Peterson be placed on the active/physically unable to perform list?

Will Percy Harvin address his alleged trade request?

What kind of connection will Christian Ponder develop with Jerome Simpson?

Can Jasper Brinkley be the starting middle linebacker?

Will Charlie Johnson struggle with his transition to left guard?

Who starts at right guard?

How is Antoine Winfield moving around after playing only six games last season?

Can Blair Walsh replace Ryan Longwell?

How will Kyle Rudolph and John Carlson be used on the field together?

Is Harrison Smith ready to start at safety?